酸盐缺乏会增加植物对Botrytis cinerea感染的易感性,因为它会诱导酸路径
Aime Jaskolowski1, Yves Poirier1
1Department of Plant Molecular Biology, University of Lausanne, 1015, Lausanne, Switzerland.
The Plant journal : for cell and molecular biology
|May 28, 2024
概括
植物中酸盐缺乏会通过增加子粘附和发芽,增加对菌 Botrytis cinerea 的易感性. 这种更高的敏感性与酸 (ABA) 水平升高和质沉积减少有关.
科学领域:
- 植物病理学 植物病理学
- 植物生理学 植物生理学
- 生物和非生物的压力相互作用.
背景情况:
- 植物拥有对环境威胁的复杂防御机制.
- 同时的压力会导致复杂的信号通路交叉,从而改变防御结果.
- 无机酸盐 (Pi) 缺乏和Botrytis cinerea感染是农业中常见的双重挑战.
研究的目的:
- 调查无机酸盐 (Pi) 缺乏对阿拉比多普西斯·塔利亚纳 (Arabidopsis thaliana) 易受 Botrytis cinerea 的影响.
- 为了阐明在Pi限制条件下参与这种植物-真菌相互作用的信号通路和防御机制.
主要方法:
- 阿拉比多普西斯·塔利亚纳 (Arabidopsis thaliana) 受到无机酸盐 (Pi) 缺乏的影响.
- 用真菌Botrytis cinerea进行的感染测定是在Pi缺乏和对照植物上进行的.
- 分析植物防御反应,包括莉酸 (JA) 和乙烯信号,二次代谢物产生,活性氧物种 (ROS) 生成和沉积.
- 测量了酸 (ABA) 水平,并抑制了ABA生物合成以评估其作用.
- 在Pi充足的植物中过度表达NCED6被用来研究升高的ABA的影响.
主要成果:
- 缺少Pi增加了阿拉比多普西斯对B. cinerea的敏感性,影响了子粘附和发芽.
- 尽管激活了JA/乙烯通路和防御代谢物生产,但在缺乏Pi的植物中,的沉积受到了损害.
- 在缺乏Pi的植物中观察到高酸 (ABA) 水平,阻断ABA生物合成逆转了易感性.
- 在Pi充足的植物中,NCED6的过度表达模仿了Pi缺乏植物的敏感性表型.
结论:
- 缺乏Pi增加了植物对B. cinerea感染的易感性,通过促进早期感染阶段.
- 由Pi缺乏引起的ABA积累增加是调解高度易感性的关键因素.
- 皮可用性,ABA信号传递和沉积之间的相互作用影响了植物对死菌菌的防御.
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